I wish we had decent phone reception where I live - none at home, none in my favourite camping spots (any of them, bar one) none at the Moot ... oh hang on ... I am glad that there is no mobile signal in these places!
Back to the main thrust of the thread ...
Some folk are so poorly educated in hill safety that they truely belive that the Nanny State is able to ensure their safety no matter what and that they have a right to go out and do anything they want.
The National Press (OK it was the Daily Wail, AKA "The Hate Mail", AKA "The Daily Male") had a photo of a woman walking up Snowdon in the snow - wearing 4" heels!
IMHO if you know the risks involved in hillwalking, if you do your best to accomodate those risks (knowledge of hill craft, wearing clothing suitable for the conditions, carrying suitable kit and knowing how to use it etc) then if things go pear shaped and you need to be rescued for whatever reason you have at least made an honest attempt to be self reliant.
If you bimble into situations in ignorance, with out preparation, kit, clothing etc then those who come to pick up the pieces (in their own time, often at personal expense) are entitled to call you an idiot!
Phones are not a reliable "get out of jail free" card!